-diff -ur madwifi.old/net80211/ieee80211_crypto_ccmp.c madwifi.dev/net80211/ieee80211_crypto_ccmp.c
---- madwifi.old/net80211/ieee80211_crypto_ccmp.c 2007-06-02 04:37:47.425966000 +0200
-+++ madwifi.dev/net80211/ieee80211_crypto_ccmp.c 2007-06-02 18:38:27.675882768 +0200
-@@ -465,6 +465,9 @@
+Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c
+===================================================================
+--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_ccmp.c 2007-06-04 13:21:53.234883736 +0200
++++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c 2007-06-04 13:21:57.936169032 +0200
+@@ -118,6 +118,12 @@
+ ctx->cc_ic = vap->iv_ic;
+ ctx->cc_tfm = crypto_alloc_cipher("aes", 0,
+ CRYPTO_ALG_ASYNC);
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
++ if (IS_ERR(ctx->cc_tfm))
++ ctx->cc_tfm = NULL;
++#endif
++
+ if (ctx->cc_tfm == NULL) {
+ IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO,
+ "%s: unable to load kernel AES crypto support\n",
+@@ -465,6 +471,9 @@